Question

Verify the identity.

sin quantity x plus pi divided by two = cos x

Answer 1

\(\sin(x +\frac{\pi}{2}) = \cos x\)

Answer 2

alright would it be easier if I try to verify the left side.

Answer 3

yes

you can expand out \(\sin(A+B) = \sin A \cos B + \sin B \cos A\)

Answer 4

what are you actually studying? you could draw and look for a geometric proof